A flaw was found in the Linux kernel's NFS implementation, all versions 3.x and all versions 4.x up to 4.20.
A flaw was found in the Linux kernel's NFS implementation, all versions 3.x and all versions 4.x up to 4.20. An attacker, who is able to mount an exported NFS filesystem, is able to trigger a null pointer dereference by using an invalid NFS sequence. This can panic the machine and deny access to the NFS server. Any outstanding disk writes to the NFS server will be lost.
- BDU:2019-02456
- openSUSE-SU-2019:1716-1
- openSUSE-SU-2019:1757-1
- RHSA-2019:1873
- RHSA-2019:1891
- RHSA-2019:2696
- RHSA-2019:2730
- RHSA-2020:0740
- RHSA-2020:1567
- RHSA-2020:1769
- SUSE-SU-2019:1744-1
- SUSE-SU-2019:1829-1
- SUSE-SU-2019:1851-1
- SUSE-SU-2019:1855-1
- SUSE-SU-2019:2069-1
- SUSE-SU-2019:2430-1
- SUSE-SU-2019:2450-1
- SUSE-SU-2019:3223-1
- SUSE-SU-2019:3246-1
- SUSE-SU-2019:3252-1
- Published
- Jul 30, 2019
- Updated
- Jun 16, 2026
- EPSS
- 2.7% · 85th percentile
- CWE
- CWE-476
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.7%
CNA vs NVD score
- NVD
- 7.5
- CNA · redhat
- 7.5
- agree
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
| redhat | developer tools | cpe:2.3:a:redhat:developer_tools |
| redhat | mrg realtime | cpe:2.3:a:redhat:mrg_realtime |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| redhat | enterprise linux desktop | cpe:2.3:o:redhat:enterprise_linux_desktop |
| redhat | enterprise linux eus | cpe:2.3:o:redhat:enterprise_linux_eus |
| redhat | enterprise linux server | cpe:2.3:o:redhat:enterprise_linux_server |
| redhat | enterprise linux server aus | cpe:2.3:o:redhat:enterprise_linux_server_aus |
| redhat | enterprise linux server eus | cpe:2.3:o:redhat:enterprise_linux_server_eus |
| redhat | enterprise linux server tus | cpe:2.3:o:redhat:enterprise_linux_server_tus |
| redhat | enterprise linux workstation | cpe:2.3:o:redhat:enterprise_linux_workstation |
| netapp | cloud backup | cpe:2.3:a:netapp:cloud_backup |
and 16 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel3.0 and later · up to 4.20 inclusive
- netapp cloud backupall versions
- netapp h300e firmwareall versions
- netapp h300s firmwareall versions
- netapp h410c firmwareall versions
- netapp h410s firmwareall versions
- netapp h500e firmwareall versions
- netapp h500s firmwareall versions
- netapp h700e firmwareall versions
- netapp h700s firmwareall versions
- redhat developer tools1.0
- redhat enterprise linux7.0
- redhat enterprise linux desktop7.0
- redhat enterprise linux eus7.4
- redhat enterprise linux server7.0
- redhat enterprise linux server aus7.4
- redhat enterprise linux server aus7.6
- redhat enterprise linux server eus7.6
- redhat enterprise linux server tus7.4
- redhat enterprise linux server tus7.6
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
Red Hat kernel:
- all 3.x, all 4.x up to 4.20affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 4.18.20-1 | 4.18.20-1 |
| openSUSE:Leap 15.0 | kernel-debug | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-default | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-docs | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-kvmsmall | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-obs-build | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-obs-qa | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-source | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-syms | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.0 | kernel-vanilla | before 4.12.14-lp150.12.67.1 | 4.12.14-lp150.12.67.1 |
| openSUSE:Leap 15.1 | kernel-debug | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-default | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-docs | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-kvmsmall | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-obs-build | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-obs-qa | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-source | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-syms | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| openSUSE:Leap 15.1 | kernel-vanilla | before 4.12.14-lp151.28.10.1 | 4.12.14-lp151.28.10.1 |
| Red Hat:enterprise_linux:7::client | bpftool | before 0:3.10.0-957.27.2.el7 | 0:3.10.0-957.27.2.el7 |
| Red Hat:enterprise_linux:7::client | kernel | before 0:3.10.0-957.27.2.el7 | 0:3.10.0-957.27.2.el7 |
| Red Hat:enterprise_linux:7::client | kernel-abi-whitelists | before 0:3.10.0-957.27.2.el7 | 0:3.10.0-957.27.2.el7 |
| Red Hat:enterprise_linux:7::client | kernel-debug | before 0:3.10.0-957.27.2.el7 | 0:3.10.0-957.27.2.el7 |
| Red Hat:enterprise_linux:7::client | kernel-debug-debuginfo | before 0:3.10.0-957.27.2.el7 | 0:3.10.0-957.27.2.el7 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
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- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:linux | 4.18.20-1 · Debian:12 | Package registry (OSV) |
| opensuse:kernel-debug | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-default | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-docs | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-obs-build | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-source | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-syms | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-vanilla | 4.12.14-lp150.12.67.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:bpftool | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel-abi-whitelists | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel-debug | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel-debug-devel | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel-debuginfo | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel-debuginfo-common-x86_64 | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel-devel | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel-doc | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel-headers | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:kernel-tools | 0:3.10.0-957.27.2.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| suse:kernel-azure | 4.12.14-5.33.1 · SUSE:Linux Enterprise Module for Public Cloud 15 | Package registry (OSV) |
| suse:kernel-default | 4.12.14-197.7.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP1 | Package registry (OSV) |
| suse:kernel-docs | 4.12.14-197.7.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP1 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP1_Update_2 | 1-3.3.1 · SUSE:Linux Enterprise Live Patching 15 SP1 | Package registry (OSV) |
| suse:kernel-obs-build | 4.12.14-197.7.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP1 | Package registry (OSV) |
| suse:kernel-source | 4.12.14-197.7.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP1 | Package registry (OSV) |
| suse:kernel-source-azure | 4.12.14-5.33.1 · SUSE:Linux Enterprise Module for Public Cloud 15 | Package registry (OSV) |
| suse:kernel-syms | 4.12.14-197.7.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP1 | Package registry (OSV) |
+4
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-476 · NULL Pointer DereferenceCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/errata/RHSA-2019:2696
- access.redhat.com/errata/RHSA-2019:2730
- access.redhat.com/errata/RHSA-2020:0740
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16871
- security.netapp.com/advisory/ntap-20211004-0002/
- support.f5.com/csp/article/K18657134
- support.f5.com/csp/article/K18657134?utm_source=f5support&%3Butm_medium=RSS
Vendor advisories and official records. Exploit/PoC links are deliberately left out.